i check the system on auto zone- it is there--
here is how
1. after you get auto zone web sight
2. inter currant veh.
3.click shopping
3. click repair instruction on left side
4.click picture repair guide
5.click chassis electrical
6.click wiring diagram on right side
7.scroll down till you find the year it is 85 to 87 and under that it continued and so on---try this again-- it is there